I would guess there is a coating of something on the pin that is gumming up with the heat from the friction. Try heating a pin with a blow drier and see if the pin gets sticky. Might be in the felt too. Keith Roberts ----- Original Message ----- From: "Farrell" <mfarrel2@tampabay.rr.com> To: <pianotech@ptg.org> Sent: Wednesday, July 16, 2003 4:55 AM Subject: Flange Center Friction Increase > I am refurbishing a YC grand action. Hammer shank flange center friction is all over the place, so I am repinning most centers. Some of the low-friction centers have the following characteristics: First swing test - 9+ swings, then each time I test the swings, the number of swings drops by one. So after the ninth (or there abouts) swing test, I'm only getting one swing. > > What is that all about? And ideas? > > Terry Farrell > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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